Effect of bispyribac-sodium on heading and seed production of annual bluegrass (Poa annua L.)

Abstract

Effect of bispyribac-sodium on heading and seed production of annual bluegrass (Poa annua L.) was investigated by a pot test under greenhouse conditions and a petri-dish test. Total number of panicles/pot, length of apical node of panicle, total dry weight of seeds/pot, total number of seeds/pot, thousand grain weight and germination rate of seed were significantly reduced at 0.1 and/or 0.3 g a.i./a of bispyribac-sodium. The inhibitory effect of bispyribac-sodium was more remarkable when applied just after heading of the weed than applied at the 3-leaf stage.